刀具磨损对加工Inconel 718残余应力影响的研究  

Research on Influence of Tool Wear on Residual Stress in Machining Inconel 718

作　　者：王文豪 吴永杰[1] 王琛[2] 高娟[1] 李龙 陈典典 Wang Wenhao;Wu Yongjie;Wang Chen;Gao Juan;Li Long;Chen Diandian(China National Heavy Machinery Research Institute Co.,Ltd.,Xi'an 710032,China;不详)

机构地区：[1]中国重型机械研究院股份有限公司,西安市710032 [2]太原科技大学环境科学与工程学院

出　　处：《工具技术》2022年第7期79-83,共5页Tool Engineering

基　　金：山西省留学基金(2017-084)。

摘　　要：为了分析刀具磨损对高温合金表面残余应力的影响规律,根据金属切削原理,以Inconel 718为工件材料,建立车削加工有限元模型,采用单因素控制法探讨刀具前、后刀面和刀尖刃口等因素在不同程度磨损状态下对工件表面残余应力的影响,并进行相关实验验证。研究表明:仿真模拟和实验结果吻合性较好,二者的刀具磨损区域和切屑形态均一致,从侧面验证了仿真模型的可靠性;随着月牙洼深度KN增加,最大残余应力σ_(y)先增加后减小,最大残余应力σ_(x)增加,且残余应力影响最大深度为0.5mm;随着后刀面磨损程度增加,最大残余压应力σ_(y)增加,最大残余拉应力σ_(x)减小;随着刀尖圆弧半径磨损程度增加,最大残余压应力σ_(y)增加,最大残余压应力σ_(x)增加。In order to analyze the influence law of tool wear on the surface residual stress of superalloy,according to the metal cutting principle,taking Inconel 718 as the workpiece material,the turning finite element model is established.The influence of factors such as tool rake face,rake face and tip edge on the surface residual stress of workpiece under dif-ferent degrees of wear is discussed by single factor control method,and relevant experiments are carried out.The results show that the simulation and experimental results are in good agreement,and worn area of the tool and the shape of chips are consistent,which verifies the reliability of the simulation model from the side.With the increase of the crescent crater depth KN,the maximum residual stressσ_(y)first increases and then decreases,the maximum residual stressσ_(x) increases,and the depth of the residual stress influence is up to 0.5mm.As the wear degree of the flank increases,the maximum residual compressive stressσ_(y)increases,and the maximum residual tensile stressσ_(x) decreases.As the wear degree of the arc radius of the tool tip increases,the maximum residual compressive stressσ_(y)increases,and the maximum residual compressive stressσ_(x)increases.

关 键 词：刀具磨损 残余应力 有限元仿真 高温合金 

分 类 号：TG132.32[一般工业技术—材料科学与工程] TG501.1[金属学及工艺—合金]